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RE: [linux-lvm] missing vg after reboot



List members:

	It might be worth adding to the How-To that no initscript modifications are necessary for Linux Mandrake, as their default rc.sysinit script contains code in it to do the vg initialization on boot up.


Very Respectfully, 

Stuart Blake Tener, IT3, USNR-R, N3GWG 
Beverly Hills, California
VTU 1904G (Volunteer Training Unit) 
stuart bh90210 net 
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Monday, September 10, 2001 7:34 PM

-----Original Message-----
From: linux-lvm-admin sistina com [mailto:linux-lvm-admin sistina com]On Behalf Of Michael Holschbach
Sent: Monday, September 10, 2001 8:49 AM
To: linux-lvm sistina com
Subject: Re: [linux-lvm] missing vg after reboot


--- "Heinz J . Mauelshagen" <mauelshagen sistina com> wrote:
>
> Michael,
>
> the pvdata output below exposes a completely messy PV structure,
> which makes me think of 2 possible reasons:
>
> a. /dev/hda2 is not the device you used to create a physical volume
>
> b. something accidentially overwrote /dev/hda2 after the PV creation
>
>
> If b is true you might still have an actual VGDA backup in
> /etc/lvmconf/ which
> you can use to vgcfgrestore(8) it to /dev/hda2 presumed that
> /dev/hda2 is
> the right device.
>
I already tried vgcfgrestore. All available backup files lead to the
same result:

> > server1:~ # vgcfgrestore -v -n data /dev/hda2
> > vgcfgrestore -- locking logical volume manager
> > vgcfgrestore -- restoring volume group "data" from
> > "/etc/lvmconf/data.conf"
> > vgcfgrestore -- checking existence of
> > "/etc/lvmconf/data.conf"
> > vgcfgrestore -- reading volume group data for "data"
> > from "/etc/lvmconf/data.con
> > f"
> > vgcfgrestore -- reading physical volume data for
> > "data" from "/etc/lvmconf/data.
> > conf"
> > vgcfgrestore -- reading logical volume data for "data"
> > from "/etc/lvmconf/data.c
> > onf"
> > vgcfgrestore -- checking volume group consistency of
> > "data"
> > vgcfgrestore -- checking volume group consistency of
> > "data"
> > vgcfgrestore -- reading physical volume "/dev/hda2"
> > vgcfgrestore -- ERROR "pv_read(): PV identifier
> > invalid" reading physical volume
> >  "/dev/hda2"
> >
My idea was to reset the values of /dev/hda2 according to the following
settings:

> > server1:~ # vgcfgrestore -v -ll -n data /dev/hda2
...
> > --- Physical volume ---
> > PV Name               /dev/hda2
> > VG Name               data
> > PV Size               27.62 GB / NOT usable 2.48 MB
> > [LVM: 148 KB]
> > PV#                   2
> > PV Status             available
> > Allocatable           yes
> > Cur LV                6
> > PE Size (KByte)       4096
> > Total PE              7069
> > Free PE               669
> > Allocated PE          6400
> > PV UUID             
> > e7sX5R-XnTm-keX6-jShf-tTlw-DUP3-mzp4zW
> >

These values seem plausible for me. Can i use them to manually edit the
PV /dev/hda2 to rescue some data?


MfG Michael

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